704991 has 16 divisors (see below), whose sum is σ = 1094400. Its totient is φ = 395328.

The previous prime is 704989. The next prime is 704993. The reversal of 704991 is 199407.

It is an interprime number because it is at equal distance from previous prime (704989) and next prime (704993).

It is not a de Polignac number, because 704991 - 2¹ = 704989 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 704991.

It is not an unprimeable number, because it can be changed into a prime (704993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 955 + ... + 1523.

It is an arithmetic number, because the mean of its divisors is an integer number (68400).

2⁷⁰⁴⁹⁹¹ is an apocalyptic number.

704991 is a deficient number, since it is larger than the sum of its proper divisors (389409).

704991 is a wasteful number, since it uses less digits than its factorization.

704991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 704991 is about 839.6374217482. The cubic root of 704991 is about 89.0009257994. Note that the first 3 decimals are identical.

It can be divided in two parts, 70499 and 1, that added together give a triangular number (70500 = T₃₇₅).

The spelling of 704991 in words is "seven hundred four thousand, nine hundred ninety-one".